A Levels Biology (9700)•9700/12/M/J/24
Explanation
Post-Cytokinesis Metabolic Activity Steps:
- Cytokinesis completes cell division, placing the cell in early G1 phase of the cell cycle.
- In G1, the cell focuses on growth and preparation for DNA synthesis, activating biosynthetic processes.
- Protein synthesis ramps up to build cellular components, while energy production supports this growth.
- DNA replication remains inactive until S phase.
Why B is correct:
- Option B (1 and 3) aligns with active protein synthesis (1) and ATP production (3) in G1, essential for cell growth per cell cycle definitions.
Why the others are wrong:
- A includes 2 (DNA replication), which is off until S phase.
- C omits 1, ignoring growth needs.
- D omits 1, neglecting biosynthetic demands.
Final answer: B
Topic: Replication and division of nuclei and cells
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